Struction co



Jan.5,`1926. 1,568,139

c. L. DEWEY K DEVICE Fon FEEDING COMMINUTED MATERIAL To A coNDuIT FiledFeb. 23, 192s ya /0f`q+- ZZ @W I /F I l ,/slby 6 /V//l/r//- Z/(/ 'Il Ilf manita im. s, 192s. j

UNITED STATES PATENT OFFICE.

CLARENCE I.. DEWEY, or -WI'LMETTE ILLINOIS, AssIoNon 'ro CEMENI` GUNcoN- s'rnuc'rIoN Co., or CHICAGO, ILLINOIS, A CORPORATION 0E ILLINOIS.

DEVICE FOR FEEDING COMMINUTED MATERIAL '10 A CONDUIT.

Application ledebruary 23, 1923. Serial No. 620,667.

To all whom it may concern;

Be it known that I, CLARENCE L. DEWEY, a citizen of the United States,residing at Wilmette, in the county of Cook and State of Illinois, haveinvented Vcertain new andI useful Improvements in Devices for Feed- .ingComminuted Material toja Conduit, of

' no provision made for cleaning the hose wheel and t ofthe wheel arebrought, in turn, under the or conduit of masses that mayaccumulatetherein to an extent that substantially closes the hose.

Furthermore the charge containing wheel into which charges of sand andcement are deposited does not make air tight connection with the feedingmeans, resulting in considerable loss of air and variation of pressure.

My improved device overcomes the above mentioned objections withoutchanging the principle of operation of said prior device and providesVadditional means by which to apply the full force of the air under`preure to the cleaning operation and. convenient means for packing therelatively moving parts containing the sand and cement.

One of the objects of the invention is to improve feeding and cleaningdevices for cement guns.

Another object is to provide, in a device of the character described,means for bypassing the feeding device and applying the full pressure ofair to the conduit to clean it.

A further object is to provide an improved means of ackin thecharge-containing he fee ing device as the pockets feeding device. j

Another object is generally to improve devices of this character. l'

Other objects and advantages will hereinafter appear.

In the drawings Fig. 1 is a longidutinall central-section takensubstantially online 1--1 of Fig. 2.

' established thru port 21 and Fig. 2 is a transverse section taken vonline 2--2 of Fig. 1.

, F ig. 3 is a section taken thru the cowl on line 3-3 of Fig. 1.

Fig. 4 is a transverse section thru the cowl taken on line 4-4 of Fig.3.

Fig. 5 is a 1an view of part of the charge holding eed wheel.

In all the views the same reference characters are used to indicatecorresponding parts. v

I have shown only parts of the device which are directly concerned withthe feeding mechanism. The means for driving the parts; for compressingair and for loading the charge-containing wheel are not of presentinterest. Y

A plart of the frame which supports the c arge-containing wheel 11 alsosupports a fitting 12 secured thereto by proper means.

There is an opening 13 in the frame 10 closed by the fitting 12 and thruwhich a cowl-like part 14 projects.

The wheel 11 is driven intermittently and blown into the hose or conduit16. A con-` duit 17 communicates with the cowl 14 and thru a hose orpipe 18 it is to be connected to a source of air supply (not shown)which furnishes air under pressure to shoot or blow the cement and sandthru the conduit There is an opening 19 which continues Athru. therotary valve 20 into the pocket 15. There is a by-pass 2l between thepassage 17 thru valve opening 20 to the conduit 16. This by-pass isshown to be closed so that the air from 17 will blow the charge to becontained in ocket 15, thru valve 20 into 'conduit 16 with the valveha'ndle 22 in position shown in full lines.

When it is desirable to clean the hose the handle 22 is raised tovertical position, shown in broken lines, whereupon communicationbetween 15 and 16 will be closed and communication between 16 and 17directly port 2l.

' A sheet of yielding material, suclr j as leather or rubber 24 1splaced around the cowl 14.- with its' lower edge in Substantial contactwith the upper ed e of the wall of the cowl 14 partly surroun ing eachpocket, to prevent the air from escaping from the air conduit. The sheet24 is held in place by a strap 25 and screws 26.. f

Having described my invention what I claim as new and desire to secureby Letters Patent, isz- 1. A- device of the character describedcomprising a charge holder for comminuted material; a conduit thru whichthe material is to be passed; means for introducing air under pressureto move the charge and a valve arranged to close the charge-holdingcontainer and to by-pass the container providimlr a direct path into theconduit.

2; device of the character described comprising a rotatable wheel havinga plurality of charge-holding pockets, intermittently moved to an extentequal to the width of a pocket; a cowl overlying the successivelypositioned pockets; a yielding packing to close the space between thecowl and positioned pockets; a conduit in communication with thepositioned pocket; an air conduit communicating with the cowl to blow acharge into the conduit and a valve to connect the two conduits togetherand to by-pass the cowl and the chargeholding pocket.

In testimony whereof I hereunto subscribed my name.

CLARENCE L. DEWEY.

